Blind stitching device



Jan. 16, 1940. J. JORDAN 2,137,237

' BL'IND s'rrrcruue DEVICE Filed Nov. 25, 1938 2 Sheets-Sheet 1 E JZEQlIN VEN TOR. JoH/v Jo RDA/V ATTORNEY Jan. 16, 1940. J. JORDAN 2,187,237

BLIND STITCHING DEVICE Filed Nov. 25, 1938 2 Sheets-Sheet 2 INVENTOR. 6;Jo HN JORDAN :51 .132 BY M ATTORNEY H a Patented an. i 914 n i v'Ifihisinvention tetra blindstitching'device, in a some respects similarytof that disclosed and pat ented to me in my Patent Nuniber 2,091,479.

the disclosure to .follow and -which is] particularly to be ascertainedby theclaims 1- e l This disclosure isrvhereinafter described in detailfor the purpose of clearly explaining the preferred embodimentselectedior the purpose. It is to be understoodwthatithe illustration herein:isbyway of example only, and. not of limitation, j that itmay beieipliecl all nwithin the scope :written.

other embodiments or the claims as ;hereinafter I accomplishthe'lnbjttsinamd and "atlas n that will beaatonce apparent to thoseskilled in ailoring and related artstbythe structure shown clamps ashereinafter described; U

- in the; accompanying :drawings, in, which a Fig. I isca plan liew ofthedevice open with a piece of fabric in place readyfoi closure ofthe"Fig. 11 isa viewfioffithersame structiire asfin has fat.

\F'ig. II. t i e v e In the drawings, [is a frame, ofiset at la forconvenienceinhandling. i 1 t i The frame I supportsone relatively fixedjaw 2 and a movable jaw 3, -,the latterbeing pivotally attached to aslidable plate 4 ,bythe pivot 5 to n Fig. I with thelclamptcloseds'andreadyfor sew- A ing iamodifled presser foot of the sewingimachinebeing indicated; 1 n

Fig. III is weathering. ii on the line Fig. IV is a sectionjof ofequalize its engagement with the jaw 2 or with fclothheld between, thejaws, representedby 6.

shown, the reverse or wrong sideof the piece of cloth isyshowntandlthepurpose of the setup in Fig. II is to sew aninlay I of-identicalmaterialintothe cloth tin such manner that the juncture or seam will benormally invisible and indeed difficult to find when one 'knows where to"look, from the other or fright? side of the cloth. Asin the inventionof the patent referred to, I

fold thecloth around oneof the jaws, preferably the fixedjaw 2insuchmannerthat abight of the clothncontainingthe edgesto be sewntogether is about midway on the race oithe jaw 2, with one part of theclothi olded back substane r Fig. IV. The "jaw wit is ian'obgiectroffthe presentinventionto devise 2a device for 'blind stitchingthat increases the 1 utility; Of "that disclosed sin the patentmentioned, to-Imakethehparallel grooving of {the jaw emem- I bers, which"whenjoined fomi needle-ways, un necessary and} to o 'tl'ierwise:jihtirealsethe rgeneral utiiity of the device, which will be apparentfrom The: jawlii as mentioned now to bedescribed, what has regarded asintroductory, H l

With ,the device of the patent, I used two hard Jfaced jaws withparallel needle grooves across fBLfINDs'rITcmNe DEVICE f etRdJohn'Joi-dan, Portland, Oreg. e en ntii fidveinber2a 1938, Serial Meaan? n team (Cl. 11 1 7 y a a y Y I tially" at tright angles on top orthe jaw and the other underneath the same jaw, all as shown in 3 isthenybrought firmly into engagement with the. cloth 6 *asjbacked bythejaw 2,.andlocked imposition. M n Y 1 r I is attached to and movable withthefslidableplate 4 which provided with "parallel slots 8 and e withinwhich are easily fitting :p'in's NJ andull; the pins being made rigidwith the frame structure underneath the slots-as shownin FigrII; i i

A toggle lever I2 is attached to the slidable plate 4 by the pivot pin43 and to a bell-crank leverl5 by they-pivot pin I 6. i g Thebell-cranklever I5 is' pivoted at iBwto an geccentric disc 19, ad:

justable at fiil to accommodate clothof difierent thicknesses betweenthe jaws Zand 3. 1

1 It is thought'tha't many ot er devicesfor holding the jaws together inlocked position areusab le and it is admitted thatthatshownissubstantial 1y oielg hence needsno furtherudescription.

The essential difference; between the devic e herein disclosed and theone patented is in parts gonebefore being their faces; requiring thatsewing machine feed" or stitch length bathe same asgroove spacing in yallucases.

is w s q iite i y a e nlis d did not permit changing the length of thestitch to an extent deemed desirable since either the stitch had to bethe same as the groove spacing, twice that or three times, nointermediate stitch length being practicable.

I now use one hard faced jaw, in this case the jaw 3, and roughen theface to sharp ridges by lengthwisemilling as shown at 3a, though'otheeforms of roughening are not excluded.

The other jaw, in this case 2 is provided'with a iaceof resilientrubbergof about the resiliency of high grade tire treadjstock, indicatedby the numeral 2a, which may be attached in any suitable manner though Iprefer to make the parts tongue and groove with the tongue on the rubberas shown in Fig. IV and fasten the rubber to the grooved metalbackinglpart of the jawby shellac or other suitable cement.

As with the device of the patent, the place where the needle 25 startsto penetrate the cloth 6 iscritical, necessarily being in the linerepresented by the bight of vertical cloth between the jawsas shown at6b in Fig. IV.

Whenthe clamps are set on the cloth tend the linebetween the jaws" is aright line with reitself, enteringon one side of of the old type.

spect to the forward feed of the sewing machine, the needle point alwayspenetrates the cloth the point of joinder and coming out again about thesame distance on the other side of what will be the seam. on the sameside of the cloth, the wrong side, as it entered. The resilient rubberyields enough to permit the needle to pass through without breaking thesewing thread and it appears that there is a much better draw, that isthe edges of the respectivepieces of cloth are drawn together betterthan withthe grooved device of the patent.

Since accurateguiding is even more critical with this device thanbefore, I provide a milled groove 21 in the hard faced jaw 3 that isparallel withthe face of the jaw. I further provide a uide 28 isattached to the modified presser foot 30..

It will be expedient to temporarily join the two pieces of cloth to besewn'together by'basting, by tailors adhesive tape or other preferredmeans. The seam may be made with tape reinforcement if desired forsleazy orloosely woven materials'though with firm} stock its strengthcompares favorably with a single lapped seam along seam as for an inlayas shown.

The word rubber as used herein is intended to embrace all materialshaving the well known resilient characteristics of rubber compounds andis not necessarily limited to those materials composed in part ofmaterial from the rubber tree.

Having disclosed my invention so that its principle has become known andshown a preferred way of applying that principle, what I claim as newand desire to secure by Letters Patent, is'- 1. In a .device for sewinga bight of cloth containing two edges'to be sewn together by blindseaming, a pair of fabric holding means for holding abutting"- edges ofa fabric in a bight for presentation to a sewing needle, one of saidpair of holding means being of hard material roughened to grip thefabric and the other of said pair of holding means being of resilientrubber, and means for guiding the pair of holding means to present thebight of cloth to the needle where it is held between the respectiveholding means.

2. A'blind seam attachment for a sewing machine comprisi a frame, a pairof clamping that bears in the guide groove 21 and It mayibe used equallywell for face'on the other jaw.

3. A blind seam attachment for a sewing machine comprising a frame, apair of clamping jaws on abutting edges of cloth to a sewing needle forentrance and egress on the same side of the cloth and means for guidingthe jaw faces in lines parallel with the line of progress of the needle,characterized by the face of one jaw being of hard material to engagethe held cloth and the face of the other jaw being of resilient rubber.

4. A sewing clamp for blind seaming, comprising a pair of opposed clothholding means that are adapted to holda bight of cloth therebetween forpenetration by a sewing needle into and out of thecloth on the same sidethereof,

said holding means having a hard, cloth holding face on one element ofsaid pair and .a' resilient rubber, cloth lholding means on otherelement ofthe pair, the hard face and the rubber face being arranged toengageopposite sides of the cloth at thepoint where the needle is topenetrate. v

5. In a blind stitching device, a, pair of cloth holding means that-areadapted to firmly hold a bight of cloth therebetween to present thebight for penetration of a sewing needle, in and out of the cloth on thesame side thereof, means'for holding the cloth' firmlyin properrelationship to a sewing needle holding means, characterized by at leastone of said faces being of soft resilient rubber.

' 6. "In a blind seaming device, a pair of clamping jaws, means forlockingabutting edges of cloth between the jaws andmeans for guiding thejaws to present the cloth clamped between the jaws to a, sewing needle,the said jaws beingcharacterizedby a rigid cloth engaging face ononef'jaw and a soft resilient cloth engaging the face of the JOHNJORDAN.

the frame that are adapted to present and holding faces on said,

